package com.chen.service;

import com.alibaba.fastjson.JSON;
import com.chen.pojo.Content;
import com.chen.utils.HtmlParseUtil;
import org.elasticsearch.action.bulk.BulkRequest;
import org.elasticsearch.action.bulk.BulkResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchRequestBuilder;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.text.Text;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.TermQueryBuilder;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightField;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.swing.text.Highlighter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@Service
public class ContentService {
    @Autowired
    private RestHighLevelClient restHighLevelClient;

//    解析数据放到es中
    public Boolean parseContent(String keys) throws IOException {
        List<Content> contents = new HtmlParseUtil().parseJD(keys);
//        将查询到的数据放到es中
        BulkRequest bulkRequest = new BulkRequest();
        bulkRequest.timeout("2m");

        for (int i = 0; i < contents.size(); i++) {
            bulkRequest.add(
                    new IndexRequest("jd_goods")
                    .source(JSON.toJSONString(contents.get(i)), XContentType.JSON));
        }
        BulkResponse bulkResponse = restHighLevelClient.bulk(bulkRequest, RequestOptions.DEFAULT);
        return !bulkResponse.hasFailures();
    }
//   获取数据，实现搜索功能
    public List<Map<String,Object>> searchPage(String keyword,int pageNo,int pageSize) throws IOException {

        if (pageNo<=1){
            pageNo=1;
        }
//        条件搜索
        SearchRequest searchRequest = new SearchRequest("jd_goods");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();

//        分页
        searchSourceBuilder.from(pageNo);
        searchSourceBuilder.size(pageSize);
//        精准匹配
        TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("title", keyword);
        searchSourceBuilder.query(termQueryBuilder);
        searchSourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));

//        执行搜索
        searchRequest.source(searchSourceBuilder);
        SearchResponse searchResponse = restHighLevelClient.search(searchRequest,RequestOptions.DEFAULT);
//        解析结果
        ArrayList<Map<String,Object>> list = new ArrayList<>();
        for (SearchHit documentFields : searchResponse.getHits().getHits()) {
            list.add(documentFields.getSourceAsMap());
        }
        return list;
    }
    //   获取数据，实现搜索功能
    public List<Map<String,Object>> searchhighLigter(String keyword,int pageNo,int pageSize) throws IOException {

        if (pageNo<=1){
            pageNo=1;
        }
//        条件搜索
        SearchRequest searchRequest = new SearchRequest("jd_goods");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();

//        分页
        searchSourceBuilder.from(pageNo);
        searchSourceBuilder.size(pageSize);
//        精准匹配
        TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("title", keyword);
        searchSourceBuilder.query(termQueryBuilder);
        searchSourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));
//        高亮
        HighlightBuilder highlightBuilder = new HighlightBuilder();
        highlightBuilder.field("title");
        highlightBuilder.requireFieldMatch(false);//关闭多个高亮
        highlightBuilder.preTags("<span style='color:red'>");
        highlightBuilder.postTags("</span>");

        searchSourceBuilder.highlighter(highlightBuilder);

//        执行搜索
        searchRequest.source(searchSourceBuilder);
        SearchResponse searchResponse = restHighLevelClient.search(searchRequest,RequestOptions.DEFAULT);
//        解析结果
        ArrayList<Map<String,Object>> list = new ArrayList<>();
        for (SearchHit hit : searchResponse.getHits().getHits()) {
            Map<String, HighlightField> highlightFields = hit.getHighlightFields();
            HighlightField title = highlightFields.get("title");
            Map<String, Object> sourceAsMap= hit.getSourceAsMap();//原来的结果
//            解析高亮字段，将源码来的字段替换成高亮字段
            if (title!=null){
                Text[] fragments = title.fragments();
                String n_title="";
                for (Text text : fragments) {
                    n_title+=title;
                }
                sourceAsMap.put("title",n_title);//高亮字段替换掉原来的字段

            }
            list.add(sourceAsMap);
        }
        return list;
    }
}

